Power line carrier wave online fault detection device
A technology of power carrier and fault detection, applied in the direction of measuring device, fault location, measuring electricity, etc., can solve the problems of high demand for manpower and large amount of engineering, and achieve the effect of avoiding waste of resources and manpower
Inactive Publication Date: 2015-05-27
JIANGXI HJATIS POWER IND CO LTD
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Problems solved by technology
[0002] Most of the current grid online fault detection devices are based on the traditional 485 interface to communicate with the network. When the grid online detector installed in remote areas is connected to the background network, it needs to be rewired to achieve communication. The secondary wiring leads to a large amount of engineering and high manpower demand.
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[0017] The present invention is further described below in conjunction with accompanying drawing:
[0018] see figure 1 and figure 2 , the present invention includes a central processing unit 12, connected with the central processing unit 12, a sampling circuit for collecting current and voltage data, a neutral line detection circuit 4 for detecting the neutral line state, and an alarm output circuit 15 for outputting an alarm signal , a power supply circuit 7 for supplying power, a button circuit 8 for inputting a comparison value, and a display circuit for displaying, the power carrier on-line fault detection device is also provided with a communication circuit for communication and an automatic control circuit for adjusting temperature A constant temperature device, the automatic constant temperature device includes a low temperature detection module 5 for detecting temperature and a temperature control module 6 for controlling temperature, the communication circuit adopt...
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The invention provides a power line carrier wave online fault detection device which comprises a central processing unit, a sampling circuit, a zero line detection circuit, an alarm output circuit, a power circuit, a keying circuit, a display circuit, a communication circuit and an automatic constant temperature device. The automatic constant temperature device comprises a low temperature detection module and a temperature control module. The communication circuit is of a power line carrier wave communication module, and comprises an A-phase, a B-phase or a C-phase transmission. The central processing unit comprises an AD sampling circuit, a compare module and an output module. The sampling circuit comprises a current mutual insulator, a voltage sensor and a true root mean square (TRMS) measuring chip, wherein the current mutual insulator and the voltage sensor are respectively connected with the TRMS measuring chip, and the TRMS measuring chip is connected with the AD sampling circuit. Because a power line carrier wave communication mode is directly adopted by the power line carrier wave online fault detection device, exclusive circuits are not needed laying. A power line carrier wave communication mode can be used as long as an electric power circuit exists, and therefore resource waste and labor waste of relaying electric power circuits are avoided.
Description
technical field [0001] The invention specifically relates to a power grid online fault detection device. Background technique [0002] Most of the current grid online fault detection devices are based on the traditional 485 interface to communicate with the network. When the grid online detector installed in remote areas is connected to the background network, it needs to be rewired to achieve communication. The secondary wiring leads to a large amount of engineering and high manpower demand. Contents of the invention [0003] In order to solve the deficiencies of the above-mentioned technologies, the object of the present invention is to provide a power carrier online fault detection device, which solves the problem that the previous power grid online detector needs secondary wiring to realize communication. [0004] The technical solution adopted by the present invention to solve its technical problems is: [0005] A power carrier online fault detection device, which in...
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IPC IPC(8): G01R31/08G01R31/02
Inventor 彭世健
Owner JIANGXI HJATIS POWER IND CO LTD